Calculator Suite
Zero clutter, fast response, and crystal-clear math. Built for students, engineers, shoppers, and daily problem-solving.
Math & Algebra Calculators
Percentages, exponents, logarithms, radicals, scientific notation & significant figures
Percentage Calculator
Solves various percentage-related problems, such as finding a percentage of a number or the percentage ratio between two numbers.
Percentage Increase Calculator
Calculates the percent increase or decrease from one value to the next with step-by-step formula breakdown.
Exponent Calculator
Calculates the result of any base raised to a positive, negative, or fractional exponent with power expansion.
Log (Logarithm) Calculator
Finds the value of a logarithm with an arbitrary base (log₁₀, ln, log₂, or custom base b).
Square Root Calculator
Computes the square root, cube root, and nth root of any number with simplified radical radical form.
Scientific Notation Calculator
Converts standard decimals into scientific notation (a × 10ⁿ), engineering notation, and performs arithmetic.
Significant Figures Calculator
Performs mathematical operations while accounting for significant figures, decimals, and proper rounding rules.
Geometry Calculators
Square footage, circles, right triangles & line slopes
Square Footage Calculator
Determines the area of various property shapes (rooms, circles, triangles, irregular areas) in square feet.
Circumference Calculator
Finds the area, circumference, radius, and diameter of a circle from any single known dimension.
Pythagorean Theorem Calculator
Finds the length of a missing leg or the hypotenuse of a right-angled triangle (a² + b² = c²) with angles and area.
Slope Calculator
Calculates the slope of a line from two given points (x₁, y₁) and (x₂, y₂), line equation, incline angle, and distance.
Statistics Calculators
Hypothesis testing, p-values & confidence interval estimation
p-value Calculator
Evaluates how compatible data is with the null hypothesis in statistical tests (Z-score, t-test, Chi-square, F-test).
Confidence Interval Calculator
Finds the confidence interval and margin of error for a sample mean or proportion at 90%, 95%, or 99% levels.
Everyday & Finance Calculators
Sales tax, salary to hourly, test grading, shopping discounts & tips
Sales Tax Calculator
Works out the tax imposed on the sale of goods and services, before-tax prices, and total amount with tax.
Salary to Hourly Calculator
Converts an annual, monthly, or weekly salary into an hourly wage with overtime, PTO, and full pay schedule breakdown.
Test Grade Calculator
Helps students and teachers quickly determine test percentage scores, letter grades (A-F), and full grading tables.
Discount & Sale Calculator
Calculate sale prices, final checkout cost, stackable coupons, sales tax, and total dollars saved.
Tip & Bill Splitter
Quick tip presets (10%, 15%, 18%, 20%), custom tip sliders, and even bill splitting among groups.
BMI & Healthy Weight
Check Body Mass Index (BMI), WHO classification, optimal target weight range in kg and lbs with visual gauge.
Kitchen & Baking Converter
Convert recipe volumes to exact grams and ounces for flour, sugar, butter, liquids, and baking ingredients.
Time Format & Duration
Convert 12-hour ↔ 24-hour military time, decimal hours to HH:MM:SS, and calculate time differences.
Unix Timestamp & Epoch
Live Unix epoch clock, timestamp to UTC/Local human date, seconds vs milliseconds, and date picker.